Blame SOURCES/httpd-2.4.6-upn.patch

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diff --git a/modules/ssl/mod_ssl.c b/modules/ssl/mod_ssl.c
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index 926e05e..bbe1d20 100644
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--- a/modules/ssl/mod_ssl.c
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+++ b/modules/ssl/mod_ssl.c
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@@ -333,6 +333,11 @@ static int ssl_hook_pre_config(apr_pool_t *pconf,
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     OpenSSL_add_all_algorithms();
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     OPENSSL_load_builtin_modules();
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+    if (OBJ_txt2nid("id-on-dnsSRV") == NID_undef) {
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+        (void)OBJ_create("1.3.6.1.5.5.7.8.7", "id-on-dnsSRV",
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+                         "SRVName otherName form");
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+    }
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+
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     /*
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      * Let us cleanup the ssl library when the module is unloaded
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      */
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diff --git a/modules/ssl/ssl_engine_kernel.c b/modules/ssl/ssl_engine_kernel.c
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index eb11a38..27eaa5a 100644
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--- a/modules/ssl/ssl_engine_kernel.c
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+++ b/modules/ssl/ssl_engine_kernel.c
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@@ -1156,6 +1156,7 @@ int ssl_hook_Fixup(request_rec *r)
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     /* standard SSL environment variables */
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     if (dc->nOptions & SSL_OPT_STDENVVARS) {
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         modssl_var_extract_dns(env, sslconn->ssl, r->pool);
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+        modssl_var_extract_san_entries(env, sslconn->ssl, r->pool);
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         for (i = 0; ssl_hook_Fixup_vars[i]; i++) {
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             var = (char *)ssl_hook_Fixup_vars[i];
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diff --git a/modules/ssl/ssl_engine_vars.c b/modules/ssl/ssl_engine_vars.c
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index c508fff..2b7c9ba 100644
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--- a/modules/ssl/ssl_engine_vars.c
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+++ b/modules/ssl/ssl_engine_vars.c
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@@ -42,6 +42,7 @@
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 static char *ssl_var_lookup_ssl(apr_pool_t *p, conn_rec *c, request_rec *r, char *var);
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 static char *ssl_var_lookup_ssl_cert(apr_pool_t *p, request_rec *r, X509 *xs, char *var);
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 static char *ssl_var_lookup_ssl_cert_dn(apr_pool_t *p, X509_NAME *xsname, char *var);
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+static char *ssl_var_lookup_ssl_cert_san(apr_pool_t *p, X509 *xs, char *var);
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 static char *ssl_var_lookup_ssl_cert_valid(apr_pool_t *p, ASN1_TIME *tm);
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 static char *ssl_var_lookup_ssl_cert_remain(apr_pool_t *p, ASN1_TIME *tm);
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 static char *ssl_var_lookup_ssl_cert_serial(apr_pool_t *p, X509 *xs);
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@@ -509,6 +510,10 @@ static char *ssl_var_lookup_ssl_cert(apr_pool_t *p, request_rec *r, X509 *xs,
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         result = ssl_var_lookup_ssl_cert_dn(p, xsname, var+5);
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         resdup = FALSE;
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     }
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+    else if (strlen(var) > 4 && strcEQn(var, "SAN_", 4)) {
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+        result = ssl_var_lookup_ssl_cert_san(p, xs, var+4);
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+        resdup = FALSE;
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+    }
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     else if (strcEQ(var, "A_SIG")) {
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         nid = OBJ_obj2nid((ASN1_OBJECT *)(xs->cert_info->signature->algorithm));
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         result = apr_pstrdup(p,
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@@ -597,6 +602,49 @@ static char *ssl_var_lookup_ssl_cert_dn(apr_pool_t *p, X509_NAME *xsname, char *
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     return result;
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 }
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+static char *ssl_var_lookup_ssl_cert_san(apr_pool_t *p, X509 *xs, char *var)
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+{
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+    int type, numlen;
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+    const char *onf = NULL;
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+    apr_array_header_t *entries;
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+
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+    if (strcEQn(var, "Email_", 6)) {
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+        type = GEN_EMAIL;
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+        var += 6;
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+    }
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+    else if (strcEQn(var, "DNS_", 4)) {
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+        type = GEN_DNS;
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+        var += 4;
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+    }
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+    else if (strcEQn(var, "OTHER_", 6)) {
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+        type = GEN_OTHERNAME;
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+        var += 6;
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+        if (strEQn(var, "msUPN_", 6)) {
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+            var += 6;
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+            onf = "msUPN";
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+        }
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+        else if (strEQn(var, "dnsSRV_", 7)) {
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+            var += 7;
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+            onf = "id-on-dnsSRV";
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+        }
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+        else
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+           return NULL;
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+    }
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+    else
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+        return NULL;
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+
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+    /* sanity check: number must be between 1 and 4 digits */
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+    numlen = strspn(var, "0123456789");
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+    if ((numlen < 1) || (numlen > 4) || (numlen != strlen(var)))
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+        return NULL;
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+
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+    if (SSL_X509_getSAN(p, xs, type, onf, atoi(var), &entries))
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+        /* return the first entry from this 1-element array */
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+        return APR_ARRAY_IDX(entries, 0, char *);
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+    else
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+        return NULL;
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+}
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+
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 static char *ssl_var_lookup_ssl_cert_valid(apr_pool_t *p, ASN1_TIME *tm)
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 {
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     char *result;
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@@ -890,6 +938,54 @@ void modssl_var_extract_dns(apr_table_t *t, SSL *ssl, apr_pool_t *p)
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     }
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 }
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+static void extract_san_array(apr_table_t *t, const char *pfx,
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+                              apr_array_header_t *entries, apr_pool_t *p)
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+{
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+    int i;
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+
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+    for (i = 0; i < entries->nelts; i++) {
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+        const char *key = apr_psprintf(p, "%s_%d", pfx, i);
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+        apr_table_setn(t, key, APR_ARRAY_IDX(entries, i, const char *));
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+    }
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+}
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+
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+void modssl_var_extract_san_entries(apr_table_t *t, SSL *ssl, apr_pool_t *p)
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+{
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+    X509 *xs;
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+    apr_array_header_t *entries;
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+
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+    /* subjectAltName entries of the server certificate */
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+    xs = SSL_get_certificate(ssl);
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+    if (xs) {
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+        if (SSL_X509_getSAN(p, xs, GEN_EMAIL, NULL, -1, &entries)) {
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+            extract_san_array(t, "SSL_SERVER_SAN_Email", entries, p);
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+        }
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+        if (SSL_X509_getSAN(p, xs, GEN_DNS, NULL, -1, &entries)) {
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+            extract_san_array(t, "SSL_SERVER_SAN_DNS", entries, p);
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+        }
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+        if (SSL_X509_getSAN(p, xs, GEN_OTHERNAME, "id-on-dnsSRV", -1,
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+                               &entries)) {
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+            extract_san_array(t, "SSL_SERVER_SAN_OTHER_dnsSRV", entries, p);
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+        }
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+        /* no need to free xs (refcount does not increase) */
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+    }
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+
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+    /* subjectAltName entries of the client certificate */
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+    xs = SSL_get_peer_certificate(ssl);
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+    if (xs) {
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+        if (SSL_X509_getSAN(p, xs, GEN_EMAIL, NULL, -1, &entries)) {
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+            extract_san_array(t, "SSL_CLIENT_SAN_Email", entries, p);
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+        }
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+        if (SSL_X509_getSAN(p, xs, GEN_DNS, NULL, -1, &entries)) {
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+            extract_san_array(t, "SSL_CLIENT_SAN_DNS", entries, p);
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+        }
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+        if (SSL_X509_getSAN(p, xs, GEN_OTHERNAME, "msUPN", -1, &entries)) {
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+            extract_san_array(t, "SSL_CLIENT_SAN_OTHER_msUPN", entries, p);
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+        }
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+        X509_free(xs);
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+    }
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+}
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+
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 /* For an extension type which OpenSSL does not recognize, attempt to
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  * parse the extension type as a primitive string.  This will fail for
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  * any structured extension type per the docs.  Returns non-zero on
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diff --git a/modules/ssl/ssl_private.h b/modules/ssl/ssl_private.h
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index a5ede6e..80e1e8e 100644
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--- a/modules/ssl/ssl_private.h
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+++ b/modules/ssl/ssl_private.h
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@@ -974,6 +974,10 @@ void         ssl_var_log_config_register(apr_pool_t *p);
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  * allocating from 'p': */
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 void modssl_var_extract_dns(apr_table_t *t, SSL *ssl, apr_pool_t *p);
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+/* Extract SSL_*_SAN_* variables (subjectAltName entries) into table 't'
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+ * from SSL object 'ssl', allocating from 'p'. */
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+void modssl_var_extract_san_entries(apr_table_t *t, SSL *ssl, apr_pool_t *p);
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+
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 #ifndef OPENSSL_NO_OCSP
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 /* Perform OCSP validation of the current cert in the given context.
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  * Returns non-zero on success or zero on failure.  On failure, the
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diff --git a/modules/ssl/ssl_util_ssl.c b/modules/ssl/ssl_util_ssl.c
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index 588ceba..09a9877 100644
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--- a/modules/ssl/ssl_util_ssl.c
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+++ b/modules/ssl/ssl_util_ssl.c
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@@ -236,22 +236,32 @@ BOOL SSL_X509_getBC(X509 *cert, int *ca, int *pathlen)
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     return TRUE;
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 }
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-/* convert a NAME_ENTRY to UTF8 string */
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-char *SSL_X509_NAME_ENTRY_to_string(apr_pool_t *p, X509_NAME_ENTRY *xsne)
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+/* convert an ASN.1 string to a UTF-8 string (escaping control characters) */
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+char *SSL_ASN1_STRING_to_utf8(apr_pool_t *p, ASN1_STRING *asn1str)
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 {
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     char *result = NULL;
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-    BIO* bio;
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+    BIO *bio;
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     int len;
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     if ((bio = BIO_new(BIO_s_mem())) == NULL)
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         return NULL;
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-    ASN1_STRING_print_ex(bio, X509_NAME_ENTRY_get_data(xsne),
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-                         ASN1_STRFLGS_ESC_CTRL|ASN1_STRFLGS_UTF8_CONVERT);
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+
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+    ASN1_STRING_print_ex(bio, asn1str, ASN1_STRFLGS_ESC_CTRL|
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+                                       ASN1_STRFLGS_UTF8_CONVERT);
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     len = BIO_pending(bio);
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-    result = apr_palloc(p, len+1);
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-    len = BIO_read(bio, result, len);
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-    result[len] = NUL;
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+    if (len > 0) {
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+        result = apr_palloc(p, len+1);
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+        len = BIO_read(bio, result, len);
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+        result[len] = NUL;
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+    }
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     BIO_free(bio);
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+    return result;
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+}
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+
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+/* convert a NAME_ENTRY to UTF8 string */
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+char *SSL_X509_NAME_ENTRY_to_string(apr_pool_t *p, X509_NAME_ENTRY *xsne)
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+{
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+    char *result = SSL_ASN1_STRING_to_utf8(p, X509_NAME_ENTRY_get_data(xsne));
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     ap_xlate_proto_from_ascii(result, len);
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     return result;
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 }
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@@ -288,51 +298,123 @@ char *SSL_X509_NAME_to_string(apr_pool_t *p, X509_NAME *dn, int maxlen)
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     return result;
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 }
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-/* return an array of (RFC 6125 coined) DNS-IDs and CN-IDs in a certificate */
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-BOOL SSL_X509_getIDs(apr_pool_t *p, X509 *x509, apr_array_header_t **ids)
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+static void parse_otherName_value(apr_pool_t *p, ASN1_TYPE *value,
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+                                  const char *onf, apr_array_header_t **entries)
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+{
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+    const char *str;
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+    int nid = onf ? OBJ_txt2nid(onf) : NID_undef;
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+
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+    if (!value || (nid == NID_undef) || !*entries)
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+       return;
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+
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+    /* 
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+     * Currently supported otherName forms (values for "onf"):
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+     * "msUPN" (1.3.6.1.4.1.311.20.2.3): Microsoft User Principal Name
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+     * "id-on-dnsSRV" (1.3.6.1.5.5.7.8.7): SRVName, as specified in RFC 4985
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+     */
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+    if ((nid == NID_ms_upn) && (value->type == V_ASN1_UTF8STRING) &&
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+        (str = SSL_ASN1_STRING_to_utf8(p, value->value.utf8string))) {
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+        APR_ARRAY_PUSH(*entries, const char *) = str;
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+    } else if (strEQ(onf, "id-on-dnsSRV") &&
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+               (value->type == V_ASN1_IA5STRING) &&
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+               (str = SSL_ASN1_STRING_to_utf8(p, value->value.ia5string))) {
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+        APR_ARRAY_PUSH(*entries, const char *) = str;
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+    }
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+}
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+
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+/* 
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+ * Return an array of subjectAltName entries of type "type". If idx is -1,
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+ * return all entries of the given type, otherwise return an array consisting
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+ * of the n-th occurrence of that type only. Currently supported types:
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+ * GEN_EMAIL (rfc822Name)
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+ * GEN_DNS (dNSName)
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+ * GEN_OTHERNAME (requires the otherName form ["onf"] argument to be supplied,
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+ *                see parse_otherName_value for the currently supported forms)
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+ */
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+BOOL SSL_X509_getSAN(apr_pool_t *p, X509 *x509, int type, const char *onf,
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+                     int idx, apr_array_header_t **entries)
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 {
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     STACK_OF(GENERAL_NAME) *names;
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-    BIO *bio;
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-    X509_NAME *subj;
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-    char **cpp;
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-    int i, n;
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+    int nid = onf ? OBJ_txt2nid(onf) : NID_undef;
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-    if (!x509 || !(*ids = apr_array_make(p, 0, sizeof(char *)))) {
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-        *ids = NULL;
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+    if (!x509 || (type < GEN_OTHERNAME) ||
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+        ((type == GEN_OTHERNAME) && (nid == NID_undef)) ||
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+        (type > GEN_RID) || (idx < -1) ||
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+        !(*entries = apr_array_make(p, 0, sizeof(char *)))) {
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+        *entries = NULL;
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         return FALSE;
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     }
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-    /* First, the DNS-IDs (dNSName entries in the subjectAltName extension) */
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-    if ((names = X509_get_ext_d2i(x509, NID_subject_alt_name, NULL, NULL)) &&
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-        (bio = BIO_new(BIO_s_mem()))) {
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+    if ((names = X509_get_ext_d2i(x509, NID_subject_alt_name, NULL, NULL))) {
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+        int i, n = 0;
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         GENERAL_NAME *name;
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+        const char *utf8str;
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         for (i = 0; i < sk_GENERAL_NAME_num(names); i++) {
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             name = sk_GENERAL_NAME_value(names, i);
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-            if (name->type == GEN_DNS) {
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-                ASN1_STRING_print_ex(bio, name->d.ia5, ASN1_STRFLGS_ESC_CTRL|
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-                                     ASN1_STRFLGS_UTF8_CONVERT);
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-                n = BIO_pending(bio);
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-                if (n > 0) {
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-                    cpp = (char **)apr_array_push(*ids);
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-                    *cpp = apr_palloc(p, n+1);
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-                    n = BIO_read(bio, *cpp, n);
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-                    (*cpp)[n] = NUL;
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+
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+            if (name->type != type)
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+                continue;
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+
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+            switch (type) {
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+            case GEN_EMAIL:
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+            case GEN_DNS:
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+                if (((idx == -1) || (n == idx)) &&
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+                    (utf8str = SSL_ASN1_STRING_to_utf8(p, name->d.ia5))) {
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+                    APR_ARRAY_PUSH(*entries, const char *) = utf8str;
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+                }
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+                n++;
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+                break;
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+            case GEN_OTHERNAME:
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+                if (OBJ_obj2nid(name->d.otherName->type_id) == nid) {
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+                    if (((idx == -1) || (n == idx))) {
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+                        parse_otherName_value(p, name->d.otherName->value,
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+                                              onf, entries);
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+                    }
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+                    n++;
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                 }
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+                break;
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+            default:
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+                /*
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+                 * Not implemented right now:
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+                 * GEN_X400 (x400Address)
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+                 * GEN_DIRNAME (directoryName)
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+                 * GEN_EDIPARTY (ediPartyName)
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+                 * GEN_URI (uniformResourceIdentifier)
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+                 * GEN_IPADD (iPAddress)
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+                 * GEN_RID (registeredID)
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+                 */
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+                break;
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             }
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+
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+            if ((idx != -1) && (n > idx))
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+               break;
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         }
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-        BIO_free(bio);
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-    }
0943f8
 
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-    if (names)
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         sk_GENERAL_NAME_pop_free(names, GENERAL_NAME_free);
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+    }
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+
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+    return apr_is_empty_array(*entries) ? FALSE : TRUE;
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+}
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+
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+/* return an array of (RFC 6125 coined) DNS-IDs and CN-IDs in a certificate */
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+BOOL SSL_X509_getIDs(apr_pool_t *p, X509 *x509, apr_array_header_t **ids)
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+{
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+    X509_NAME *subj;
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+    int i = -1;
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+
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+    /* First, the DNS-IDs (dNSName entries in the subjectAltName extension) */
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+    if (!x509 ||
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+        (SSL_X509_getSAN(p, x509, GEN_DNS, NULL, -1, ids) == FALSE && !*ids)) {
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+        *ids = NULL;
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+        return FALSE;
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+    }
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     /* Second, the CN-IDs (commonName attributes in the subject DN) */
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     subj = X509_get_subject_name(x509);
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-    i = -1;
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     while ((i = X509_NAME_get_index_by_NID(subj, NID_commonName, i)) != -1) {
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-        cpp = (char **)apr_array_push(*ids);
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-        *cpp = SSL_X509_NAME_ENTRY_to_string(p, X509_NAME_get_entry(subj, i));
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+        APR_ARRAY_PUSH(*ids, const char *) = 
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+            SSL_X509_NAME_ENTRY_to_string(p, X509_NAME_get_entry(subj, i));
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     }
0943f8
 
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     return apr_is_empty_array(*ids) ? FALSE : TRUE;
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diff --git a/modules/ssl/ssl_util_ssl.h b/modules/ssl/ssl_util_ssl.h
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index 4b882db..be07ab7 100644
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--- a/modules/ssl/ssl_util_ssl.h
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+++ b/modules/ssl/ssl_util_ssl.h
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@@ -65,8 +65,10 @@ EVP_PKEY   *SSL_read_PrivateKey(char *, EVP_PKEY **, pem_password_cb *, void *);
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 int         SSL_smart_shutdown(SSL *ssl);
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 BOOL        SSL_X509_isSGC(X509 *);
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 BOOL        SSL_X509_getBC(X509 *, int *, int *);
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+char       *SSL_ASN1_STRING_to_utf8(apr_pool_t *, ASN1_STRING *);
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 char       *SSL_X509_NAME_ENTRY_to_string(apr_pool_t *p, X509_NAME_ENTRY *xsne);
0943f8
 char       *SSL_X509_NAME_to_string(apr_pool_t *, X509_NAME *, int);
0943f8
+BOOL        SSL_X509_getSAN(apr_pool_t *, X509 *, int, const char *, int, apr_array_header_t **);
0943f8
 BOOL        SSL_X509_getIDs(apr_pool_t *, X509 *, apr_array_header_t **);
0943f8
 BOOL        SSL_X509_match_name(apr_pool_t *, X509 *, const char *, BOOL, server_rec *);
0943f8
 BOOL        SSL_X509_INFO_load_file(apr_pool_t *, STACK_OF(X509_INFO) *, const char *);